Sash construction



@am 17, 1935. Q M, VERHAGEN 2,24,192

SASH CONSTRUCTION Filed July 30, 1934 am l 17 er el?, @@Wwuzp, www

Patented Dec. 1.7, 1935 UNITED STATES SASH CONSTRUCTION Christian M.Verhagen, Chicago, Ill., assignor to The Adlake Company, Chicago, Ill.,a corporation of Illinois Application July 30, 1934, Serial No. 737,600

6 Claims.

This invention has to do with metallic window sash of the type used inrailway cars and buses, and is particularly concerned with the provisionoi' a way of manufacturing the rail members for the sash from extrudedaluminum as distinguished from ordinary sheet metal.

The principal object of the invention is to provide an extruded aluminumbottom rail which is light, neat and inexpensive and will hold its shapewithout bending, spreading or buckling under the weight of the sash whenthe latter is brought down on the sill.

Gther more specific objects and advantages will be apparent to thoseskilled in the art upon a full understanding of the construction of thenew rail.

One form of the invention is presented herein for the purpose ofexempliilcation, but it will of course be appreciated that the inventionis susceptible of embodiment in other structurally modied forms comingequally within the scope of the appended claims.

in the accompanying drawing:

Fig. l is a perspective view of a portion of th bottom rail of a sash;

Fig. 2 is a transverse section through the bottoni rail;

Fig. 3 is a perspective view of a portion oi' one oi the component partsof the rail; and

Fig. 4i is a similar view of the corresponding portion of the otherpart.

As will be observed in the drawing, the improved bottom rail is composedof two extruded aluminum sections it and il. The outer section i9 is ofgenerally U-shape cross section and is characterized by at parallel sideWalls l2, a reentrant glazing groove i3 in the back it of the section,inwardly projecting tenon ribs l5 on the inner sides of the side wallsabout midway between the nat under surface i6 of the back and the loweri'ree edges l'l of the side walls, and inwardly projecting flanges i8 onthe edges.

The inner section li is in the form of a nat strip and is characterizedby mortise grooves I9 in its edges, of the same shape and size as theribs l5. The sections are assembled together by sliding the innersection longitudinally into the outer section, with the ribs |5- andgrooves I9 in dovetailed engagement with each other. Only the upperfaces of the ribs and grooves are ared in providing the desiredinterlock, but both faces might of course be flared.

The upper surface of the inner section Il is ilat and forms with theunder surface i6 of the back of the section I0 and with the interveningportions of the side walls I2 a tubular guideway 2l of rectangular crosssection in which a locking bolt for the sash may be slidably mounted.The under surface 22 of the inner section, which may be hollowed outintermediate its side edges as at 23 for lightness, forms the bottom ofa groove 2d 5 for the reception of a rubber sealing strip 25, whichstrip is held in the groove by the anges i8 which fit into small groovesin the side oi the sealing strip.

As it is not feasible to extrude aluminum in the tubular form desiredfor sesh rails, a channel or U form is the only alternative and in thosecases where the sides of such a form would be too weak, as in the caseof a sash rail, the present invention resides in tying the sidestogether'wltb 3g tenon ribs and mortise grooves. Of course a rivetedstrip could be used in effecting the cross connection, but this would bemore costly and would-not have as neat an appearance, as the rivetswould show through the sides of the rail 2o even though the heads werepolished 0E ush with such sides. v

This double section rail construction, which permits both sections to beformed by extrusion, is exceedingly light, rigid and strong, and will 2gwithstand, without warping or spreading, the severe strains to which thebottom rails of car and bus sash are subjected in service. The new composite construction is not limited in its utility, however, to bottomrails alone but can be used, 3o either in the form shown or in somesuitably modiiled one, in the manufacture of top and side rails as well,and can of course be made up in metals other than aluminum.-

I claim:

1. A bottom rail for sash, consisting of an extruded aluminum outersection of generally U- shape cross section having a reentrant glazinggroove in the closed back thereof, and inwardly projecting tenon ribs onthe inner sides of the 40 side walls between the back and the free edgesoi the section, and an extruded aluminum inner section of bar-like formpositioned in the outer section and provided in its side edges withmortise grooves in dove-tailed association with the ribs, said innersection abutting the side walls of the outer section above and below theribs.

2. A bottom rail for sash, consisting of an outer section of generallyU-shape cross section having a reentrant glazing groove in the closedback thereof, inwardly projecting tenen ribs on the inner sides of theside walls between the back and the free edges of the section, andinwardly projecting flanges on the free edges, and an inner section inthe form of a strip positioned in the outer section and provided in itsside edges with mortise grooves in dove-tailed association with theribs, said inner section abutting the Vside walls of the outer sectionabove and below the ribs.

3. A bottom rail for sash, consisting of an outer section of generallyU-shape cross section having a reentrant glazing groove in the closedback thereof, inwardly projecting tenon ribs on the inner sides of theside walls between the back and the free edges of the section, andinwardly projecting anges on the free edges, and an inner section in theform of a strip positioned in the outer section and provided in its sideedges with mortise grooves in dove-tailed association with the ribs,said inner section abutting the side walls of the outer section aboveand below the ribs and forming the bottom of a groove for the receptionof a sealing strip engaged by the inwardly pro- Jecting anges on theedges of the side walls.

4. A bottom rail for sash, consisting of an outer section of generallyU-shape cross section having a reentrant glazing groove in the closedback thereof, inwardly projecting tenon ribs on the inner sides of theside walls between the back and the free edges of the section, andinwardly projecting flanges on the free edges, and an inner section inthe form of a strip positioned in the outer section and provided in itsside edges with mortise grooves in dove-tailed association with theribs, said inner section abutting the side walls of the outer sectionabove and below the ribs and forming with the inner surface of the backof the outer section a tubular guideway of rectangular cross section forthe reception of a slidably mounted locking bolt.

5. A bottom rail for sash, consisting of an outer section of generallyU-shape cross section having a reentrant glazing groove in the closedback thereof, inwardly projecting tenon ribs on the inner sides of theside walls between the back and the free edges of the section, andinwardly. projecting flanges on the free edges, and an inner section inthe form of a. strip positioned in the outer section and provided in itsside edges with mortise grooves in dove-tailed association with theribs, said inner section abutting the side walls of the outer sectionabove and below the ribs and forming the bottom of a groove for thereception 1s of a sealing strip and also forming with the inner surfaceof the back of the outer section a tubular guideway of rectangular crosssection for the reception of a slidably mounted locking bolt.

6. A two-part rail structure for sash, consisting of an outer section ofgenerally U-shape cross section, and an inner section positioned in theouter section intermediate the back and edges of the latter, said outerand inner sections being provided with longitudinally extending ribs andgrooves winch nt together in interlocking relation when the innersection is slid longitudinally into the outer section into assembledrelation with the latter, and said inner section being arranged with itsupper and lower surfaces disposed respectively above and below theinterlocking ribs and grooves.

CHRISTIAN M. VERHAGEN.

